Circuit board mounting bracket



FIG. 1 is a front elevational view showing my new design for a circuit board mounting bracket;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top right front perspective view thereof. 

The ornamental design for a circuit board mounting bracket, as shown and described. 